folds



Jan. 30, 1923.V 1,443,887

R. G1 SANDS. ET AL.

Fuss. FILE Der. l0, 1919. 3 swears-SHEET 3V mllflllllll Patented Jan. 30, 1923.

noirv G.. semis, or wennen, .iomr c. no or Evmsromf 4Innrnors, sssronons T rumors, n 'conronmrroir or ILLINOIS.

one; or oAK PABX, AND enonon n. nonne, o mm: B. ooox comm, or omonco,

FUSE.

Appliton #led October 1U, 1919. Serial Ifo. 329,794.

To all'whomzt p concern.m

Be it'lmown tha we; Rofr G.- SANDS, JOHN G. Booms,l and Geenen-R. Fonos,` citizensA of the United States. residlg, respectivel at Waukegan, county ofi' ske; Oak I urk, count of Cook2 Evanstonycounty of Cook, and tate lof= Illinois, lliave'nventednew and useful Improvements 'in Fusesgzf which the following iecfnll', clear yooncse,'v.nd exact description, reference @beinlgihadr to the accompanying drawings, forming part of this speeifimtion.'A

Our. invention relates to improvements in fuses, Aand particularly that type of known as u renewable fuse. 'fOne of the ob jects ofourinvention is toprovide a-finse of the abovetype wherein a. properventing ofl the pressure and products of combustion caused by the blowin of the fuse may be accomplished without e danger of the Home followingthe vent.. 1" 1 f Anotherobject of our invention-istoprovide a fuse' ofthe aboveclinracter' which, while properly venting the products of combustion, will at the'same time reduce' to the minimum the sealing ofthe, renewable ports' to the permanent parte by the melted portion of the fuse when the fuseis'blfown. "if fr' `For the purpose' ofidisclosing our inventionwe have illustrated certain'exnhodiments of4 the same in the accompanying' a. tubularshell portion 1 formed of fibre or drawings. `In said dra l Fig. 1 is a longitudinal sectional view o f c fuse embodying our invention;

Fi 2 issn elevation of the fuse illustra in Fig. 1, parts of the seme being shown broken away substantially on the line 2-2 of Fig. 1; A

Fig. 3 is a. sectional view teken on the line 3-3 of Fig. 1;

Fig. 4 is u sectional view taken on the line 4 4 of Fig. 1; f

Fig. 5 is a perspective View of the fuse link used in the structure shown in the above-mentioned figures;

Fi 6 is a. Sectional view illustrating n. modi cation of our proposed invention;

Fig. 7 is e sectional view taken on the line 7 7 of Fig. 6;

Fi 8 is a detail sectional view of still anot er modification o'f our invention;

F ig. 9 is e Section teken on the line 99 of Fig. 8;

Fig. l() is a detail of the clamping washer used m connection with the structure illustrated in Fig. 8;

Fig. 11 is a.. detail section of still another form in which our invention may be'embodied;

Fi 12 is a sectional view taken on the line 2-12 of Fig. 11;i

Fig. 13 is a sectional View taken on the line 13 13 of Fig. 11' i.

Fi 14'is a detaii section of another form in w ich our invention ma Y Fig.Y 15 isn sectional view taken on the line 154-15 'of Fig. 14;

:Fi 16j is a detail section illustrating still ano er modification of our invention;

Fig. 1T is c plan view with the cover removed; and

Fig. 18'is :i detail perspective of a form ofy fuse which maybe substituted for the usc illustrated in Fig.'16.

Referr' o` first tothe embodiment illusA trated inmFi Fl'to 5, in' this 'structure' as well, as the tsher stnictu'res we provide an enclosing casing which preferably comprises other insulatin materiel.' Secured at each end of this she is a metallic ferrule 2 hav ing a reduced portion 3, which is externally screw-threaded and engages internal threads on the fibre portion 1 to secure the ferrule in position. Above the edge of the fibre ortion the errule is enlardged and is provided with external threads a opted to engage the infernal threndso a cap 4 screwed thereon for 'closing the ends of the shell. The cap is cup-shaped and is provided with :i petticoat 5 which fits down over theend of the fibre material. The top of the cap is provided with a. circular window 6 through which the fuse may be observed. The fuse proper prefv be embodied;

ernhly consists nl :i link 'i nl' fusible mnu:- l'ial reduced in sine :IL ileA couter. (hw. end of this linkt :is illustrated umn. cloni-ly in Fig. is henltransverselyT :is :it and then hack upon itself. :is :it 9, and formed in the enrl of the' link is n slot lll which elnhraces not onlv the horizontal portion S hut a portlnn of the body of tlle'jlinknnfl aporton of the folded-back end 9. This ond of the link is png-.led through u washer 11, which isV minded with n pair of Slots 1 2 just sulmifent i"*lni'nc -tofreceve the link, which nehm-lies wihin n cup 13 having its edge I4 crimped over the washer to clamp the washer and cup together, and this culi, ait-a. point where it will register with thgynidon' 6, is provided with nveht opening 14. The washer member witlpthp usegeclpflthere to is adapted to rest on the'onntersnirk 'shoulder l5 within ,the ielixjulf jund., 15 clamped and. secured ines'inon hy the ,top oi the reni. .lhuslb link l 1s first psf sembled with the washer 11 tofrethcrnwitih `the up V1.3. liefern` it -is inserted In the; en-

The opposite end of the fnge may besenredin any suitable manner.` .One means position we have illustrated 1n the drawings. slio\rn,-tbe bottom ferrnle 2 hasn cloned end port-'lun 16 which on one side is z-ovidnd -ntli slotted Upn' l. The n ofthe inse, whicliis prefers ly rounded; ne :LL 18,-to-nssi3t in threading the n1, LS Passed through the S-tten opening andtnrned-ox'er the, top of the 'closure member, bmg slumped between the top and the cnp 4. 4In'nngilalnigf, the fuse .member :having attgched theretothe washer member: is passed into the shell, the end 18 being passed tbro'uizh the opening 17 and turned over nn the c nsnre port-ion 16, The cap is thonscrcn'ed in position, clamping thijs end in plane. The washer member is fitted within the ferrule nt .the opposite end, this Washer member resting on the dosing .ming 0i the insee.

` shoulderl and the cap screwed in 7osition,

clamping the fliehen-member in. le inse is thus assembled and ready impuso, 'Yhen the fuse blows, the gases formed thereby will vent through the milione` nath formed by the channel o.: slot 10, Dwing along the outer fece of washer 1l from auch end f the slut .and theme out through theopemne 14 and through the window 6. 1t le thus seen that while n vent forth@ producten# combint-ica ie provided, atr the same menthe Pelli of this mnt is tortuous and long enough and surrounded by ai sullicient oool snrfaice, so that the gases are cooled and n er of a. flame, unused by the lilowivng of the fuse, following or escaping to the exterior is prevented. At the same time, themolten Fortier! of the fuse, which will. tend to folow through the .venhnnnng in @ontw with the chilled surfaces and thereby solidithe wh' erf' 'fe iii eiof'hswshcr ,1 3 notched to permit the passage there- 'lliigmfh oltshe fuse link. The fuse link' in r portion thereof oonaved, the ed of the notch in the washer against-mili fthe fum-link has is also een. ya, exuptfpr etrni'giitffnon Vshown 11,1 dotted i@ so that the two @repusaanllliem elene'prox- The turned-.overnQ-@ endoulld'uok-@t and rig-mn overget that thefuse luik, atthls 110mb is providdwoh i; double fold. ,In the fpertwn 25 djeoen the' verbi- 1mi; above-.bhe :nadien is i cal ortiono opening 28., Tlliilnngfcominuncates with one end of an elongatedslotfr) formed ,iuwthellolded 'portion *26, und tho entesy with an opening30-formedin .the-top fold 42T. The .cap f1,.wl1en; Scnewedon; ciampi? this toldo@ end of the be# tel-xt niltie .wwhftel AIt will be noted t a. no ,e' isposed'. `Q`pmungs` 2S wd 39 and the longatd Slbt 29e tqrln ous path for the esoapenof 4the':ganen-.ilimiproducts;l of opxnbustion from `:theinterior of the fuso Shell to the exterior is` provided, so thnt while the gases and pressure created by the blowing,t of the {'use may oeeapo to the atmosphere, they esieepe 'throngh a. vent which is boi'tlwus and which, therefore, prevents the of lire.

In the striwturo illustrated in` Figs. 8 tu 10, the yend ofthe fuse link is turned over n v,washer 31. This washer is supported in position in the same mamie): as the waisher 2 8. The washer 31, however, is provided with a. peripheral' notch 82, against which fit; the curved portion 2A of the fuse link. The upper turned-over end 35 Vof the fuse is provided with an opening 34 coin siding with the opening 6 m the eap. and the top fano of the washer 3l is provided with a transverse groove 33, which toward' the center of the wiwher con'imunicntes with the opening 34. This groove nlso'oommnnicales with a recess 36 in the periphery-of the notch-32,- so that when the fuse is blown the assage of the products of combustion will e lrst through the opening formed'by the re 3B, then transversely along the groove 33, and then through the opening in Lineal-sev theffuselink 34,' outthrongh'itie window in the capi .'This-,passagei it willlbemotedf, is tortuous, andzlth -flmer rsnlting^--rom the blowing `of the fuseowillfriotifxsh-j to: the atmosphere.

In the structure illustrated in Fi rs. 11 to 13, the endaof the fuse' link is folde or bent over :i washerg'smilrf ofthe washer 22 having. n notchi'n its'ipeiphery to permit the link to pues therethrough. In this form, however, the link is provided with a, longitudinal slot 37, which extends from n point well down on the link up to :1 point near the end of the folded portion. Covering the link at its upper cud is e sheath 38 of nmterinl which is 110treadlly fusible, such, for instance, as thin copper or the like, and this sheath at the top and coineidin with the window 6 in the ca is provide with an opening 39. It is tus seen that a tortuous path formed b the slot and beginnin at the lower en of the sheath is form in the link, this path communicatin to the atmosphere through'the window and through the opening 39 1n the sheath.

In the structures illustrated in F' s. 14 and 15 the washer or disk 22" is cylin rical and the fuse link is bent back into the notch 4l in the Ilan e 19 to pas the edge of the washer or dis 22". A passage 40 is thus formed between the inner` wall of the annular flange 19 and the enlar ed bent over end of the link. The end of e fuse link is slotted, as at 42, so that in passing out the products of combustion will-pass up through the notch 41 around the passage formed between the ed e of the end of the link and the annular ange 19, thence by the way of the slot 42 and out through the view opening 6 in the cap.

In the structure illustrated in Fig. 16 the end of the link is corrugated where it is bent over the csp, as at 43, thereb)r forming a plurality of transverse passages through which the products of combustion can escape from the ath formed between the ed e of the turne -over portion of the link an the annular flange.

In Fi 18 we have illustrated a. different ineens o forming the corrugations. Instead of bending the metal, as is illustrated in Fig. 16, longitudinal and transverse corrugations 44 are formed in the top fece of the bent-over portion by stamping. These corrugations or channels form, however, a tortuous channel for the gas Having thus described our limrention, what we claim as new und desire to secure by Letters Patent is 1. In n fuse, the combination with un enclosing casingr comprising a shell, terminals secured to the shell, a link passing through seid shell and engaging said terminals, said casing having a tortuous vent opening communicating with the interior thereof and 'hahringrat' lisasta portion offsaid tortuous ifcntform'exl in the linkv .':A @flu ellisse,"thecombination with a per- -nin'ent portion in'cljndinge casing oompris` ing-` an insulatingshell',l 4and termmel' 'menibers secured to the insulating shellfo 'a frerx'ewjble-pfortionl 'cr'nrrprsing"alY fuse link, cas'in' having a to'rtuo'us vent opening Ainem themteriorfthereoft tlistmos'phere and said vent opening havinga ath through said renewable portion and indpependent of the shell of the fuse.

3. In a fuse, the combination with :in in sulating shell, terminals secured to the insulating shell, a fusible link passing through said shell and engaging said terminals, and means independent of the shell for venting the interior ofthe shell through seid fusible link.

4. In a fuse, the combination with an insulating shell having a vent openin terminals secured to said shell, a fusib e link passing through said shell and enrraoin said terminals, and a passage in said Llin forming at least a portion of the vent opening for said shell.

'5. In a fuse, the combination with an insulating shell, terminals secured to Said shell, n fusible link aesing through said shell and deformed to orm a tortnons passage communicating between the interior and exterior of the shell.

6. In u fuse, the combination with an in.- sulating shell, of contact members secured l on sairl'shelha fusible link exteudin through 100 said shell having an openin in at esst one end thereof, a covering mein er for one end of said link also having an opening therein, said opening in the covering member and opening in the fusible link constituting a 105 tortuous passage communicating with the interior of the shell and extending to the exterior.

7. An enclosed vented lfuse comprising a shell member, end caps therefor, a washer 11n for one end of the shell and contained in one of seid end cage, and a fusible link heving one of its en portions inserted intermediate seidy washer and the associated end cap, a tortuons vent for venting the fuse 115 extending through said end cap and 'said fusible link.

8. An enclosed vented fuse comprisin a shell member. a removable terminal member for one end thereof, a` washer for said ter- 120 minal member. and a fusible link contained in said shell member and havin one of its end portions bent over and. p aced intermediate said washer and said terminal member, the fuse being.r vented through n tortu- 125 ous passa ewey which is formed, in peut, through t e bent-over end portion of said fusible link.

9. An enclosed vented fuse comprising a shell member, a terminal member therefor, a 18 fusible link received .in said shell member member, the fuse being ventedthrough a 10 und having one of its .ends in contact with ,toi'tuouspath at least aportion o'f wh'c'h is vseid 1381111111111- me-mbet, the fuse being formed insaid fusible link.

vented through a. tortupus path at least :L In witness whereof, we have hereunto portion thereoflbeng formed in said fusisubscribed our names.

blelmk. l 10. A n enclosed vented fuse com-pris a ROY G. SANDS. shell-member, a terminal member there or, JOHN C. BQGLE.

and vai fusible link received in said shell GEORGE R. FOIJDS.A 

